CN107817011A - Photoelectric encoder - Google Patents
Photoelectric encoder Download PDFInfo
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- CN107817011A CN107817011A CN201710789110.4A CN201710789110A CN107817011A CN 107817011 A CN107817011 A CN 107817011A CN 201710789110 A CN201710789110 A CN 201710789110A CN 107817011 A CN107817011 A CN 107817011A
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- 108700020469 14-3-3 Proteins 0.000 description 5
- 102000004899 14-3-3 Proteins Human genes 0.000 description 5
- 230000011664 signaling Effects 0.000 description 5
- 230000033228 biological regulation Effects 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
- G01D5/34707—Scales; Discs, e.g. fixation, fabrication, compensation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
- G01D5/34707—Scales; Discs, e.g. fixation, fabrication, compensation
- G01D5/34715—Scale reading or illumination devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
- G01D5/34746—Linear encoders
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Abstract
The present invention provides a kind of photoelectric encoder, can realize the reduction of the power consumption of light source.Encoder (1) possesses：Scale (2), it has scale along measure direction；Detector (3), it has the light receiving unit (5) that the light from light source (4) irradiation is received via scale (2), is relatively moved along the measure direction of scale (2) and detects the rate of travel with scale 2；Control unit 6), it controls detector (3).Control unit (6) possesses：Fader control portion (10), it is controlled, so that the light quantity increase and decrease of light source (4), so as to keep defined light income；Mistake determination unit (11), it is based on the light decision error received by light receiving unit (5)；Light quantity suppressing portion (12), it stops the control of fader control portion (10) when wrong determination unit (11) is determined as mistake, suppresses the light quantity of light source (4).Thus, encoder (1) suppresses the light quantity of light source (4) by using light quantity suppressing portion (12), can realize the reduction of the power consumption of light source (4).
Description
Technical field
The present invention relates to the fader control of the light source of photoelectric encoder.
Background technology
At present it is known that there is a kind of photoelectric encoder, it possesses：Scale, it has scale along measure direction；Detector,
It has the light receiving unit that the light from light source irradiation is received via scale, and relatively moves and detect along the measure direction of scale
With the rate of travel of scale；Control unit, it controls detector.In this photoelectric encoder, light receiving unit is received via mark
The light from light source of chi simultaneously detects the different two-phase sine wave signal (Li Saru signals) of 90 ° of phases.Photoelectric encoder is based on
The detection of the rate of travel of detector and scale is carried out by the Li Saru signals of light receiving unit detection.Here, work as light receiving unit
When the amplitude of the Li Saru signals of detection is smaller, the problem of relative change of noise is big and measurement accuracy reduces be present.
Thus, for example the encoder described in JP 2013-096756 possesses：Error detecting part, it detects Lee's Sa
The error away from preferable Li Saru waveforms that waveform (Li Saru signals) is included is eaten, accumulative computing is carried out to the error detected
And set new corrected value；Light source drives processing component, and it adjusts the electric current supplied to light source according to the corrected value.Light source drives
Processing component adjusts the electric current to light source when detecting the error of Li Saru waveforms by error detecting part, suppresses measure essence
The reduction of degree.Specifically, photoelectric encoder increases the light quantity of light source by increasing to the electric current of light source, thus with light quantity compared with
Hour is compared, and can obtain the Li Saru waveforms with reliability.
But the amplitude of Li Saru waveforms it is smaller when, if light source driving processing component increases electric current to light source, deposit
The power consumption quantitative change of light source is big the problem of.
The content of the invention
It is an object of the present invention to provide a kind of photoelectric encoder, can realize the reduction of the power consumption of light source.
The present invention provides a kind of photoelectric encoder, possesses：Scale, it has scale along measure direction；Detector, it has
There is the light receiving unit that the light from light source irradiation is received via scale, relatively moved and examined along the measure direction of the scale
Survey the rate of travel with the scale；Control unit, it controls the detector, it is characterised in that described control unit has
It is standby：Fader control part, it is controlled such that the light quantity of the light source is increased and decreased, so as to keep defined light income；It is wrong
Misinterpretation part, it is based on the light decision error received by the light receiving unit；Light quantity suppression component, it judges in the mistake
When part is determined as mistake, stop the control of the fader control part, suppress the light quantity of the light source.
According to this present invention, photoelectric encoder possesses the mistake judgement based on the light decision error received by light receiving unit
Part, thereby, it is possible to diminish in the amplitude of such as Li Saru signals, it is determined as when the reliability reduction of photoelectric encoder
Mistake.Moreover, photoelectric encoder possesses control and the suppression for stopping fader control part when wrong judging part is determined as mistake
The light quantity suppression component of the light quantity of light source processed, it is to become big to the electric current of light source thereby, it is possible to suppress by fader control component controls.
Therefore, light quantity suppression component can suppress the excessive control of electric power of fader control part progress, therefore, it is possible to realize light source
The reduction of power consumption.
Now, preferably described light quantity suppression component puts out the light source when the wrong judging part is determined as mistake
Go out.
According to this structure, light quantity suppression component extinguishes light source when wrong judging part is determined as mistake, therefore, it is possible to
Further realize the reduction of the power consumption of light source.
Additionally, it is preferred that the light quantity suppression component presses down the light source when the wrong judging part is determined as mistake
System is in defined light quantity.
According to this structure, light quantity suppression component suppresses light source defined when wrong judging part is determined as mistake
Light quantity, therefore, it is possible to realize the reduction of the power consumption of light source.Here, photoelectric encoder is extinguishing light by light quantity suppression component
In the case of source, it is impossible to detect Li Saru signals.But light source is set to suppress the feelings into regulation light quantity by light quantity suppression component
Under condition, the light of light source irradiation regulation light quantity, therefore, photoelectric encoder may can detect Li Saru signals.
Now, preferably described control unit is also equipped with：Recover control unit, it by the wrong judging part based on being sentenced
Fixed mistake, by the light quantity suppression component suppress light source light quantity after, make the light source output be used for make the light quantity control
Part processed recovers the light of control as recovery signal；Mistake judging part again, its based on the light received by the light receiving unit again
Secondary decision error, the recovery control unit recover the light quantity control when judging part is not determined as mistake to the mistake again
The control of part processed.
According to this structure, photoelectric encoder possesses the light controlled for making light source output be used to recover fader control part and is
Recover signaling protein14-3-3 control unit and the mistake judging part again based on the light received by light receiving unit decision error again,
Thus, light can be recovered in such as detection Li Saru signals and mistake when judging part is not determined as mistake again by recovering control unit
Measure the control of control unit.
Now, preferably described recovery control unit makes to recover letter described in the light source output by making the light source scintillation
Number.
According to this structure, recover control unit by making light source scintillation, even in the phase for making light source output recover signal
Between, it can also realize the reduction of the power consumption of light source.
Here, using LED (Light Emitting Diode:Light emitting diode) as in the case of light source, LED has
There is the characteristic due to adding up usage time and deteriorating, therefore, recover control unit by making light source scintillation, light source can be realized
(LED) long lifetime.Therefore, photoelectric encoder can suppress the deterioration of light source.
Now, preferably described recovery control unit, which is based on defined opportunity, makes to recover signal described in the light source output.
According to this structure, recovering control unit can make light source output recover signal based on defined opportunity.Therefore, light
The light quantity that suppression component suppresses light source is measured, is until recovery control unit makes light source output recover signal based on defined opportunity
Only, therefore, it is possible to realizing the reduction of the power consumption of light source.
Additionally, it is preferred that the control unit that recovers passes through the light in the mistake judged based on the wrong judging part
Measure suppression component suppress light source light quantity after, with the detector carry out relative movement for opportunity make it is extensive described in the light source output
Complex signal.
According to this structure, recover control unit and can be pressed down in the mistake judged based on wrong judging part by light quantity
After part processed suppresses light quantity, carry out relative movement with detector makes light source output recover signal for opportunity.Therefore, light quantity suppressing portion
Part suppresses the light quantity of light source, untill recovering relative movement of the control unit based on detector and light source output is recovered signal,
Therefore, it is possible to realize the reduction of the power consumption of light source.
Additionally, it is preferred that the control unit that recovers passes through the light in the mistake judged based on the wrong judging part
After measuring the light quantity that suppression component suppresses light source, have passed through certain time as opportunity, make to recover signal described in the light source output.
According to this structure, recover control unit and can be pressed down in the mistake judged based on wrong judging part by light quantity
After part processed suppresses the light quantity of light source, have passed through certain time as opportunity, light source output is set to recover signal.Therefore, light quantity presses down
Part processed suppresses the light quantity of light source, untill after certain time, recovering control unit and light source output is recovered signal, because
This, can realize the reduction of the power consumption of light source.In addition, recovering control unit have passed through certain time as opportunity, make light source
Output recovers signal, therefore, it is possible to after some period of time, automatically make light source output recover signal.
Brief description of the drawings
Fig. 1 is the stereogram for the encoder for representing first embodiment of the invention；
Fig. 2 is the block figure for the encoder for representing first embodiment of the invention；
Fig. 3 is the flow chart of the fader control for the light source for representing first embodiment of the invention；
Fig. 4 A are the charts of the change for the size for representing Li Saru signals；
Fig. 4 B are the charts of the change for the light quantity for representing light source 4；
Fig. 5 is the block figure for the encoder for representing second embodiment of the invention；
Fig. 6 is the flow chart of the fader control for the light source for representing second embodiment of the invention；
Fig. 7 is the chart of the flicker for the light source for representing second embodiment of the invention；
Fig. 8 A and Fig. 8 B are the charts of the variation of the flicker for the light source for representing second embodiment of the invention；
Fig. 9 is the flow chart of the fader control for the light source for representing third embodiment of the invention；
Figure 10 is that the recovery control for representing third embodiment of the invention performs the flow chart of process；
Figure 11 is that the recovery control for representing third embodiment of the invention performs the flow chart of the variation of process.
Embodiment
(first embodiment)
Hereinafter, based on brief description of the drawings first embodiment of the invention.
Fig. 1 is the stereogram for the encoder for representing first embodiment of the invention.
As shown in figure 1, encoder 1 is that possess along measure direction (X-direction) to have graduated scale 2 and along scale 2
X-direction relatively moved and detect the photo-electric linear encoder with the detector of the rate of travel of scale 23.
In addition, in the following description, the moving direction that the long side direction of scale 2 is detector 3 is recited as X side sometimes
To.
Scale 2 is formed as strip using glass etc., possesses the X-direction along scale 2 alternately with reflecting part and non-anti-
Penetrate the scale 21 of the increment pattern in portion and the scale 22 of absolute pattern.Scale 2 and detection are detected according to the scale 21 of increment pattern
First 3 rate of travel, and absolute position is detected according to the scale 22 of absolute pattern.
Detector 3 has light source 4 and light receiving unit 5.
Light source 4 uses such as LED, to the irradiation light of scale 2.Light receiving unit 5 receives light via the scale 21,22 of scale 2, and
The light quantity change of the light of reception is set to electric signal.Moreover, light receiving unit 5 according to 90 ° of phases of the electrical signal detection it is different two
Phase sine wave signal (Li Saru signals).Encoder 1 carries out scale 2 and inspection based on the Li Saru signals detected by light receiving unit 5
The detection of the rate of travel of gauge head 3.Here, the light quantity for the light for making to reflect via scale 2 is transformed into the side of electric signal
Formula is referred to as reflection photo-electric.
Fig. 2 is the block figure for the encoder for representing first embodiment of the invention.
Encoder 1 is also equipped with controlling the control unit 6 of detector 3 and based on transporting in Li Saru signal outputs control unit 6
The output unit 7 of the rate of travel of calculation.
Control unit 6 possesses：Fader control part 10, mistake judging part 11, light quantity suppression component 12.In addition, control
Unit 6 is according to the Li Saru signals detected by light receiving unit 5, the rate of travel of computing scale 2 and detector 3.
Output unit 7 in the display picture such as the computer being connected with encoder 1 output display by control unit 6
The rate of travel of computing.
Fader control part 10 be controlled such that light source 4 light quantity increase and decrease and keep as defined in light income.Specifically,
The dirt of fader control part 10 on due to scale 2 etc., the size of Li Saru signals (amplitude of Li Saru signals) is than advance
The size of the preferable Li Saru signals of setting becomes hour, and increasing to the electric current of light source 4 increases light quantity.In addition, fader control
Part 10 is reduced to light source 4 when the size of Li Saru signals becomes big than the size of preferably Li Saru signals set in advance
Electric current reduce light quantity.So, the progress of fader control part 10 light receiving unit 5 remains able to detect preferable Li Saru signals
Defined light income control.
In addition, in the following description, the size of the amplitude of Li Saru signals is recited as to the size of Li Saru signals sometimes.
Mistake judging part 11 is based on the light decision error received by light receiving unit 5.Specifically, mistake judging part 11
The Li Saru signals of wrong determinating reference more set in advance and the Li Saru signals detected by light receiving unit 5, by light list
The Li Saru signals of the detection of member 5 are determined as mistake than the Li Saru signal hours of wrong determinating reference.Here, mistake judges base
Standard is set to that light receiving unit 5 can not detect the size of the Li Saru signals of Li Saru signals.In the Li Sa detected by light receiving unit 5
Eat signal it is smaller than the Li Saru signals of wrong determinating reference in the case of, noise is relative to become big and measurement accuracy reduces, therefore, by
Light unit 5 can not detect normal Li Saru signals.
Light quantity suppression component 12 stops the control of fader control part 10 when wrong judging part 11 is determined as mistake,
Suppress the light quantity of light source 4.Specifically, light quantity suppression component 12 suppresses the light quantity of light source 4 by extinguishing light source 4.
Fig. 3 is the flow chart of the fader control for the light source for representing first embodiment of the invention.
Hereinafter, reference picture 3 illustrates the fader control of light source 4.
Fader control process (the step for controlling the fader control part 10 of the light quantity of light source 4 to carry out is first carried out in encoder 1
ST01).Then, mistake judging part 11 judges whether there is mistake in Li Saru signals based on the light received by light receiving unit 5
(step ST02).
Mistake judging part 11 is determined as (being "Yes" in step ST02) during mistake, and light quantity suppression component 12, which performs, stops light
The light quantity measured the control of control unit 10 and extinguish light source 4 suppresses process (step ST03).Make light using light quantity suppression component 12
When source 4 is extinguished, light receiving unit 5 can not detect Li Saru signals.When mistake judging part 11 is not determined as mistake (in step ST02
For "No"), return to step ST01, fader control part 10 performs fader control process.
Fig. 4 A and Fig. 4 B be the Li Saru signals for representing first embodiment of the invention size and light source light quantity change
The chart of change.Specifically, Fig. 4 A are the charts of the change for the size for representing Li Saru signals, and Fig. 4 B are the light for representing light source 4
The chart of the change of amount.
The longitudinal axis is set to the size of Li Saru signals by Fig. 4 A, and transverse axis is set to the amount of the dirt of scale 2.Fig. 4 B set the longitudinal axis
For the light quantity of light source 4, and transverse axis is equally set to Fig. 4 (A) amount of dirt.
Hereinafter, reference picture 4A and Fig. 4 B illustrates the change of the size of Li Saru signals and the light quantity of light source 4.
As shown in fig. 4 a and fig. 4b, during the amount increase of the dirt of scale 2, the light quantity that light receiving unit 5 receives is reduced, Li Saru
Signal diminishes.Therefore, fader control part 10 increases the electric current to light source 4, increases light quantity, and light receiving unit 5 is received
Light quantity is kept into certain (step ST01, reference picture 3).Thus, untill the amount a of dirt, light receiving unit 5 passes through fader control
The control of part 10, even if having dirt, also detect normal Li Saru signals.
The amount increase of dirt and when reaching the amount a of dirt, the light quantity of light source 4 by the control of fader control part 10
Maximum amount Max is reached, therefore, with the increase of the amount of dirt, the light quantity that light receiving unit 5 receives is reduced, the Li Saru of detection
Signal diminishes.
Further increase from the amount a of dirt to the amount b of dirt, the amount of dirt, the size of Li Saru signals reaches dirt
When measuring b wrong determinating reference, mistake judging part 11 is determined as wrong ("Yes" in step ST02).Moreover, light quantity suppresses
Part 12 makes light source 4 extinguish (step ST03) in the amount b of dirt.
According to this present embodiment, following effect and effect can be realized.
(1) encoder 1 possesses the wrong judging part 11 based on the light decision error received by light receiving unit 5, thus, energy
It is enough to be determined as mistake such as in the case that Li Saru signals diminish and the reliability of encoder 1 reduces.Moreover, encoder 1
Possesses the light of the control for stopping fader control part 10 when wrong judging part 11 is determined as mistake and the light quantity for suppressing light source 4
Suppression component 12 is measured, thereby, it is possible to suppress to be controlled such that to the electric current of light source 4 from fader control part 10 to become big.Therefore,
Light quantity suppression component 12 can suppress the excessive control of electric power of the progress of fader control part 10, therefore, it is possible to realize light source 4
The reduction of power consumption.
(2) light quantity suppression component 12 extinguishes light source 4 when wrong judging part 11 is determined as mistake, therefore, it is possible to enter
One step realizes the reduction of the power consumption of light source 4.
(3) light source 4 is controlled into defined light by light quantity suppression component 12 when wrong judging part 11 is determined as mistake
Amount, therefore, it is possible to realize the reduction of the power consumption of light source 4.
In addition, in step ST03 (reference picture 3), light quantity suppression component 12 performs the light quantity suppression process for extinguishing light source 4, but
Also it is able to carry out extinguishing light source 4, and light quantity of the Xanthophyll cycle of light source 4 in defined light quantity is suppressed into process.Herein, it is specified that
Light quantity be preferably smaller than the maximum amount Max of light source 4, and light receiving unit 5 can detect the light quantity of the degree of Li Saru signals.
Thus, when light source 4 is suppressed into defined light quantity by light quantity suppression component 12, light source 4 irradiates defined light quantity
Light, therefore, encoder 1 have the possibility of detectable Li Saru signals.
(second embodiment)
Hereinafter, based on brief description of the drawings second embodiment of the invention.In addition, in the following description, to the portion having been described above
Point, simultaneously the description thereof will be omitted for mark same symbol.
Fig. 5 is the block figure for the encoder for representing second embodiment of the invention.
The encoder 1 of above-mentioned first embodiment possesses control unit 6, and control unit 6 possesses fader control part 10, mistake
Misinterpretation part 11 and light quantity suppression component 12.In contrast, as shown in figure 5, the encoder 1A of present embodiment possesses control
Unit 6A, control unit 6A possess：Fader control part 10, mistake judging part 11, light quantity suppression component 12, in addition also
Possess and recover control unit 13 and mistake judging part 14 again, it is different from above-mentioned first embodiment at that point.
Recover control unit 13 based on the mistake judged by wrong judging part 11, suppress light using light quantity suppression component 12
After the light quantity in source 4, light source 4 is exported the light of the control for recovering fader control part 10 and be used as recovery signal.Now, recover
Control unit 13 makes the output of light source 4 recover signal by flashing light source 4.
Mistake again judging part 14 based on the light received by light receiving unit 5 decision error again.
Here, mistake again using with the Li Saru of the wrong identical mistake determinating reference of judging part 11 believe by judging part 14
Number, compared with the Li Saru signals detected by light receiving unit 5, determine whether with mistake.In addition, judging part 14 can again for mistake
With without using the Li Saru signals with the wrong identical mistake determinating reference of judging part 11, and by than wrong judging part 11
The big Li Saru signals of mistake determinating reference are set to the wrong determinating reference of wrong judging part 14 again, will can also sentence than mistake
The small Li Saru signals of wrong determinating reference for determining part 11 are set to the wrong determinating reference of mistake judging part 14 again.
Recover control unit 13 in light receiving unit 5 according to recovering signal detection Li Saru signals, and mistake judging part again
14 when not being determined as mistake, recovers the control of fader control part 10.
Fig. 6 is the flow chart of the fader control for the light source for representing second embodiment of the invention, and Fig. 7 is to represent the present invention the
The chart of the flicker of the light source of two embodiments.
The longitudinal axis is set to the light quantity of light source 4 by the chart of the flicker of Fig. 7 expression light source 4, and transverse axis is set into time t.
Hereinafter, reference picture 4A and Fig. 4 B, Fig. 6 and Fig. 7 illustrate the fader control of light source 4.
As shown in fig. 6, first, encoder 1A light quantity suppression component 12 perform step ST03 light quantity suppress process after,
Performing recovery control unit 13 flashes light source 4 and exports to recover signaling protein14-3-3 control process (step ST14).Such as Fig. 4 A
And shown in Fig. 4 B, in the amount b of dirt, when light quantity suppression component 12 performs light quantity suppression process, light source 4 extinguishes.Light source 4 extinguishes
Afterwards, light source 4 is made to be flashed with maximum amount Max and minimum amount of light 0 and with certain cycle as shown in fig. 7, recovering control unit 13
And export recovery signal.Now, by recovering control unit 13, light source 4 is between maximum amount Max and minimum amount of light 0 with side
The wavy flicker of shape.
As shown in fig. 6, after recovering the recovery control process that control unit 13 performs step ST14, mistake judging part 14 again
Judge whether have wrong (step ST15) in Li Saru signals based on the light received by light receiving unit 5.Mistake judging part again
14 are determined as during mistake ("Yes" in step ST15), return to step ST14, recover control unit 13 and perform recovery control process.
Judging part 14 is not determined as during mistake ("No" in step ST15) mistake again, return to step ST01, fader control part 10
Recovered and perform fader control process.
In addition, in step ST14, recovering control unit 13 flashes light source 4 and exports recovery signal, but can not also make
Light source 4 flashes and recovers signal with certain light quantity output.Now, the light quantity of light source 4 is preferably that light receiving unit 5 can detect Lee
The light quantity of the degree of Sa Ru signals.
In such present embodiment, except that can realize that (1)~(3) identical with above-mentioned first embodiment is made
With beyond, effect, additionally it is possible to realize following effect, effect.
(4) encoder 1A makes light source 4 export the light controlled for recovering fader control part 10 to recover by possessing
Signaling protein14-3-3 control unit 13 and mistake judging part 14 again based on the light received by light receiving unit 5 decision error again,
Light quantity control can be recovered when detecting Li Saru signals and wrong judging part 14 again is not determined as mistake by recovering control unit 13
The control of part 10 processed.
(5) recover control unit 13 by flashing light source 4, during the output of light source 4 is recovered signal, also can
Enough realize the reduction of the power consumption of light source 4.
(6) recover control unit 13 by flashing the light source 4 for being used as LED, the long lifetime of light source 4 can be realized.Cause
This, encoder 1A can suppress the deterioration of light source 4.
Fig. 8 A and Fig. 8 B are the charts of the variation of the flicker for the light source for representing second embodiment of the invention.
In addition, the flicker for recovering the light source 4 that control unit 13 is carried out can not be as shown in fig. 7, in maximum amount Max and most
It is wavy with triangle between maximum amount Max and minimum amount of light 0 with square wavy flicker between small light quantity 0, and as shown in Figure 8 A
Flicker, can also be flashed between maximum amount Max and minimum amount of light 0 with sinusoidal wave shape as shown in Figure 8 B.
In addition, recovering control unit 13 can not be flashed with maximum amount Max and minimum amount of light 0, and with than maximum amount
Light quantity small Max enters line flicker for the maximum of waveform, and minimum value that can also be using the light quantity bigger than minimum amount of light 0 as waveform is entered
Line flicker.
(the 3rd embodiment)
Hereinafter, based on brief description of the drawings third embodiment of the invention.
In addition, in the following description, same symbol is marked to the part having been described above and the description thereof will be omitted.
Fig. 9 is the flow chart of the fader control for the light source for representing third embodiment of the invention.
In above-mentioned second embodiment, encoder 1A control unit 6A performs recovery control work in step ST14
Sequence.In contrast, the control unit 6A of present embodiment performs recovery control in step ST14a and performs process, at that point
It is different from above-mentioned second embodiment.
As shown in figure 9, encoder 1A makes recovery after light quantity suppression component 12 performs step ST03 light quantity suppression process
Control unit 13 performs makes the output recovery signaling protein14-3-3 control of light source 4 perform process (step ST14a) based on defined opportunity.
Figure 10 is that the recovery control for representing third embodiment of the invention performs the flow chart of process.Specifically, it is table
The step ST14a of diagram 9 recovery control performs the flow chart of the action of the recovery control unit 13 in process.
As shown in Figure 10, control unit 13 is recovered after light quantity suppression component 12 performs step ST03 light quantity suppression process
(reference picture 9), judges whether detector 3 relatively moves (step ST21) relative to scale 2.Here, detector 3 is relative to scale
2 rate of travel is detected by light receiving unit 5, but suppresses the light quantity of light source 4 using light quantity suppression component 12, it is thus impossible to
Detect whether detector 3 is relatively moved relative to scale 2 by light receiving unit 5.Therefore, recover control unit 13 to utilize
Such as acceleration transducer for being installed on detector 3 judges whether detector 3 is relatively moved.Recover control unit 13 to sentence
It is set to detector 3 to have carried out during relative movement ("Yes" in step ST21), performing flashes light source 4 and export to recover signal
Recover control process (step ST22).Recover when control unit 13 is determined as that detector 3 is not relatively moved (in step ST21
"No"), return to step ST21.
After recovering the recovery control process that control unit 13 performs step ST22, judging part 14 is based on by light mistake again
The light that unit 5 receives judges whether have wrong (step ST23) in Li Saru signals.Judging part 14 is determined as mistake to mistake again
Mistake ("Yes" in step ST23), return to step ST22, recover control unit 13 and perform recovery control process.Mistake judges again
Part 14 is not determined as during mistake ("No" in step ST23), recovers control unit 13 and terminates to recover control execution process.
In such present embodiment, except that can realize and above-mentioned first embodiment and above-mentioned second embodiment
Beyond identical effect, effect, additionally it is possible to realize following effect, effect.
(7) recovering control unit 13 can make the output of light source 4 recover signal based on defined opportunity.Therefore, light quantity suppresses
Part 12 suppresses the light quantity of light source 4, is until recovery control unit 13 makes the output of light source 4 recover signal based on defined opportunity
Only, therefore, it is possible to realizing the reduction of the power consumption of light source 4.
(8) recover the mistake that control unit 13 can be judged based on wrong judging part 11, utilize light quantity suppression component 12
After suppressing light quantity, carried out relative movement with detector 3 makes the output of light source 4 recover signal for opportunity.Therefore, light quantity suppression component
12 suppress the light quantity of light source 4, the output of light source 4 is recovered signal until recovering relative movement of the control unit 13 based on detector 3
Untill, therefore, it is possible to realize the reduction of the power consumption of light source 4.
In addition, step ST14a recovery control is performed in process, recover control unit 13 and detection is judged in step ST21
Whether first 3 relatively moved, but can also determine whether to have passed through certain time.
Figure 11 is that the recovery control for representing third embodiment of the invention performs the flow chart of the variation of process.
As shown in figure 11, the light quantity that control unit 13 performs step ST03 (reference picture 9) in light quantity suppression component 12 is recovered
After suppressing process, determine whether to have passed through certain time (step ST21a).
Recover ("Yes" in step ST21a) when control unit 13 is judged to have passed through certain time, execution dodges light source 4
Sparkle and export and recover signaling protein14-3-3 control process (step ST22).When recovery control unit 13 was determined as without certain time
("No" in step ST21a), return to step ST21a.
Thus, recover the mistake that control unit 13 can be judged based on wrong judging part 11, pass through light quantity suppression component
After 12 suppress the light quantity of light source 4, the output of light source 4 is set to recover signal as opportunity have passed through certain time.Light quantity suppression component 12
Suppress the light quantity of light source 4, untill after certain time, recovering control unit 13 and the output of light source 4 is recovered signal, because
This, can realize the reduction of the power consumption of light source 4.In addition, recover control unit 13 makes light have passed through certain time as opportunity
The output of source 4 recovers signal, therefore, it is possible to after some period of time, automatically make the output of light source 4 recover signal.
(deformation of embodiment)
In addition, the present invention is not limited to the respective embodiments described above, can reach deformation in the range of the purpose of the present invention,
Improvement etc. is contained in the present invention.
For example, in the respective embodiments described above, illustrate the present invention being used for encoder by taking photo-electric linear encoder as an example
1st, 1A situation, but encoder 1,1A can also be rotary encoders.Alternatively, it is also possible to be utilized in other analyzers etc., such as
What installation present invention is not particularly limited.
In the respective embodiments described above, using encoder 1,1A as light receiving unit 5 receive scale 2 scale 21,22 reflect
The reflection photo-electric of light is recorded, but scale 2 can also possess the scale 21,22 with through portion and non-through portion,
And light receiving unit 5 receives the transmission shape photo-electric of the light for the through portion for having passed through scale 21,22.Scale 2 possesses increment pattern
Scale 21 and the scale of absolute pattern 22, but scale 2 does not have as long as there is scale, the form and detection mode of detector etc.
It is particularly limited to.
As more than, the fader control of the light source of photoelectric encoder present invention can be suitably applied to.
Claims (8)
1. a kind of photoelectric encoder, possesses：Scale, it has scale along measure direction；Detector, it has connects via scale
The light receiving unit of the light from light source irradiation is received, is relatively moved along the measure direction of the scale and detects the phase with the scale
To amount of movement；And control unit, it controls the detector, it is characterised in that
Described control unit possesses：
Fader control part, is controlled, so that the light quantity increase and decrease of the light source, so as to keep defined light income；
Mistake judging part, it is based on the light decision error received by the light receiving unit；And
Light quantity suppression component, it stops the control of the fader control part when the wrong judging part is determined as mistake,
Suppress the light quantity of the light source.
2. photoelectric encoder as claimed in claim 1, it is characterised in that
The light quantity suppression component extinguishes the light source when the wrong judging part is determined as mistake.
3. photoelectric encoder as claimed in claim 1, it is characterised in that
The light source is suppressed to defined light by the light quantity suppression component when the wrong judging part is determined as mistake
Amount.
4. such as photoelectric encoder according to any one of claims 1 to 3, it is characterised in that
Described control unit is also equipped with：
Recover control unit, it is pressed down based on the mistake judged by the wrong judging part by the light quantity suppression component
After having made the light quantity of light source, the light that the light source output is used to make the fader control part recover control is set to believe as recovery
Number；And
Mistake judging part again, its based on the light received by the light receiving unit decision error again,
The recovery control unit recovers the fader control part when judging part is not determined as mistake to the mistake again
Control.
5. photoelectric encoder as claimed in claim 4, it is characterised in that
The recovery control unit makes to recover signal described in the light source output by making the light source scintillation.
6. the photoelectric encoder as described in claim 4 or 5, it is characterised in that
The recovery control unit, which is based on defined opportunity, to be made to recover signal described in the light source output.
7. photoelectric encoder as claimed in claim 6, it is characterised in that
The control unit that recovers is passed through the light quantity suppression component and suppressed in the mistake judged based on the wrong judging part
After the light quantity of light source, carried out relative movement with the detector makes to recover signal described in the light source output for opportunity.
8. photoelectric encoder as claimed in claim 6, it is characterised in that
The control unit that recovers is passed through the light quantity suppression component and suppressed in the mistake judged based on the wrong judging part
After the light quantity of light source, have passed through certain time as opportunity, make to recover signal described in the light source output.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-177668 | 2016-09-12 | ||
| JP2016177668A JP7058935B2 (en) | 2016-09-12 | 2016-09-12 | Photoelectric encoder |
Publications (2)
| Publication Number | Publication Date |
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| CN107817011A true CN107817011A (en) | 2018-03-20 |
| CN107817011B CN107817011B (en) | 2023-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710789110.4A Active CN107817011B (en) | 2016-09-12 | 2017-09-05 | Photoelectric encoder |
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| Country | Link |
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| US (1) | US10466078B2 (en) |
| JP (1) | JP7058935B2 (en) |
| CN (1) | CN107817011B (en) |
| DE (1) | DE102017008425A1 (en) |
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| JP2024037476A (en) | 2022-09-07 | 2024-03-19 | 株式会社ミツトヨ | One-dimensional measuring machine and one-dimensional measuring machine control program |
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Also Published As
| Publication number | Publication date |
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| JP2018044782A (en) | 2018-03-22 |
| DE102017008425A1 (en) | 2018-03-15 |
| CN107817011B (en) | 2023-04-18 |
| US10466078B2 (en) | 2019-11-05 |
| JP7058935B2 (en) | 2022-04-25 |
| US20180073898A1 (en) | 2018-03-15 |
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